Elsevier

Thermochimica Acta

Volume 307, Issue 1, 24 November 1997, Pages 17-25
Thermochimica Acta

Thermodynamics and calorimetry
Thermochemistry of nitro compounds. Experimental standard enthalpies of formation and improved group-additivity values

https://doi.org/10.1016/S0040-6031(97)00359-6Get rights and content

Abstract

The standard molar enthalpies of vaporization ΔvapH0 or sublimation ΔsubH0 of 1-nitropentane A, nitrocyclohexane B, 2,4,4-trimethyl-2-nitropentane C, 3-nitro-3-(p-nitrophenyl)-pentane D, 1,4-dinitrobenzene E, 1,2-dinitrobenzene F, and 2-amino-nitrobenzene G were obtained from the temperature variation of the vapour pressure measured in a flow system. The standard enthalpies of formation ΔfH0 (1 or cr) at the temperature T=298.15 K were measured using combustion calorimetry for compounds B, C and D. The derived ideal-gas enthalpies of formation of the compounds of A-G and the data available from the literature were used for the calculation of group-additivity parameters useful in the application of the Benson correlation.

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    The experimental part of the work was done at the Institute of Organic Chemistry and Biochemistry, University of Freiburg, Germany.

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